As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START ON RECALL, LEFT PACK LITE ILLUMINATED. RAN CHECKLIST. UPON MASTER CAUTION RESET, THE LITE WENT OUT. GROUNDED - YES. REMOVED AND REPLACED LH TEMPERATURE CONTROL VALVE IAW B737-800 AMM 21-51-10-000-801 AND AMM 21-51-10-400-801, ETOPS GROUND FUNCTIONAL CHECK GOOD IAW AMM 21-61-00-700-806-002, LEAK CHECK GOOD.